SSH: What's the difference or interplay between /etc/ssh/host files and /.ssh/public key Ask Question Asked 4 years, 11 months ago. So now my assumption is that these are pre-made default keys that you can use without having to generate your own keys or any of that. Because I have generated my own (password protected) keys, I wanted to. Mar 28, 2020 On the client or source host, this file must be configured and in addition at least one host key must exist under /etc/ssh: /etc/ssh/sshconfig – allow clients to request host-based authentication; Enable below values in /etc/ssh/sshconfig on the client trying host key authentication to all machines. Jun 18, 2013 I thought the installation would take care of key-generation as nothing is mentioned on the install section of the wiki SSHD. Should the install section on the wiki contain a bunch of.
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[donotprint][/donotprint]To regenerate keys you need to delete old files and reconfigure openssh-server. It is also safe to run following commands over remote ssh based session. Your existing session shouldn’t be interrupted.
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Why regenerate new ssh server keys?
Most Linux and Unix distribution create ssh keys for you during the installation of the OpenSSH server package. But it may be useful to be able re-generate new server keys from time to time. Codeigniter rest api generate key code. For example, when you duplicate VM (KVM or container) which contains an installed ssh package and you need to use different keys from cloned KVM VM guest/machine.
Steps to regenerate OpenSSH host keys on Linux
Let us see all steps
Generate Etc Ssh Ssh_host_dsa_key DownloadStep 1 – Delete old ssh host keys
Login as the root and type the following command to delete files on your SSHD server:
# /bin/rm -v /etc/ssh/ssh_host_* Sample outputs: Step 2 – Debian or Ubuntu Linux Regenerate OpenSSH Host Keys
Now create a new set of keys on your SSHD server, enter:
# dpkg-reconfigure openssh-server Sample output:
You just regenerated new ssh server keys. You need to restart ssh server:
$ sudo systemctl restart ssh OR $ /etc/init.d/ssh restart Centos generate a public/private ssh key pair for the server.
Step 3 – Update all ssh client(s) known_hosts filesSsh Regenerate Host Key
Finally, you need to update ~/.ssh/known_hosts files on client computers, otherwise everyone will see an error message that read as follows:
Either remove host fingerprint or update the file using vi text editor (command must be typed on client machine):
$ ssh-keygen -R remote-server-name-here Now login using the ssh command: $ ssh [email protected]
ConclusionGenerate Etc Ssh Ssh_host_dsa_key Version
You just regenerated OpenSSH Host Keys on a Debian or Ubuntu Linux using the dpkg-reconfigure command. For more info see the man page or this wiki page here:
$ man dpkg-reconfigure
Generating A New Ssh Key
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